Conditional fit method with callback

[Braunson]

Currently when registering media conversions you would do this:

$this->addMediaConversion('foobar')
     ->fit(Manipulations::FIT_CROP, 2048, 2048)

However what if I want to add a size conditionally, say based on the image itself. For example, I want to add this fit only when the image uploaded is larger than 2048x2048. It would be great to have fit support a conditional callback OR an entirely new method called fitWhen.

$this->addMediaConversion('foobar')
     ->fit(Manipulations::FIT_CROP, 2048, 2048, fn () => $width > 512 && $height > 512)
     
// OR

$this->addMediaConversion('foobar')
     ->fitWhen(Manipulations::FIT_CROP, 2048, 2048, fn () => $width > 512 && $height > 512)